Transcript Slide 1

POINT
 Has no size, only location
A
LINE
 Continues without end in
opposite directions. You can
name a line by using two
points on the line.
A
B
AB
PLANE
 A flat surface that extends
indefinitely in four directions.
PARALLEL LINES
 Lines in the same plane that do
not intersect.
ANGLE
 is made up of two lines with a
common endpoint called the
vertex.
O
VERTEX
M
P
<OMP or <PMO
RIGHT ANGLE
 Measures exactly 90°
W
X
Z
<WXZ or <ZWX
OBTUSE ANGLE
 Measures greater than 90° and
less than 180°
U
K
T
<UTK or <KTU
STRAIGHT ANGLE
 Measures exactly 180°
C
R
B
<CBR or < RBC
PERPENDICULAR
 Lines that intersect to form right
angles.
COMPLEMENTARY
ANGLES
 Two angles, the sum of whose
measures is 90°.
R
<RTS and <STU
are
complementary
angles
S
T
U
SUPPLEMENTARY
ANGLES
 Two angles, the sum of whose
measures is 180
I
D
<DGI and <IGF are
supplementary angles
G
F
TRANSVERSE LINES
 Intersect a pair of parallel lines.
1
7
8
2
<s 1 & 2 and <s
7 & 8 are
outside the
parallel lines.
They are
exterior angles.
5
3
6
4
<s 3,4,5, and 6
are inside the
parallel lines.
They are
called interior
angles.
CONGRUENT ANGLES
 Angles that have the same
measure.
ACUTE TRIANGLE
 A triangle with three acute
angles.
OBTUSE TRIANGLE
 A triangle with one obtuse
angle.
RIGHT TRIANGLE
 A triangle that has one right
angle.
EQUILATERAL
TRIANGLE
 A triangle with three congruent
sides and three congruent
angles.
ISOSCELES
TRIANGLE
 A triangle that has two
congruent sides.
SCALENE TRIANGLE
 A triangle with no congruent
sides.
POLYGON
 A closed shape formed by line
segments that do not cross.
CONVEX POLYGON
A rubber band
can fit tightly
around this
figure.
PARALLELOGRAM
 A quadrilateral with both pairs of
opposite sides parallel.
RECTANGLE
 A parallelogram with four right
angles.
RHOMBUS
 A parallelogram with four
congruent sides.
SQUARE
 A rectangle with four congruent
sides.
TRAPEZIUM
 A quadrilateral with exactly one
pair of parallel sides.